How to modify a FF used for the Compensation plan to answer to a new requirement

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Hi community,

Oracle consulting had implemented several FF for the compensation plan columns set up of our company. Now we need to do a similar set up by ourselves for a client and we don't understand how to create these FFs. We supposed to start from the FFs configurated for us by Oracle and modify them but we don't understand how to act in the formula code in order to make it functioning for our case.

I give you an example: we need a column to print in the plan column the contract level of the employee (